Parser.cpp revision effa8d1c97b00a3f53e972b0e61d9aade5ea1c57
15f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===--- Parser.cpp - C Language Family Parser ----------------------------===// 25f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 35f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// The LLVM Compiler Infrastructure 45f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 50bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// This file is distributed under the University of Illinois Open Source 60bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// License. See LICENSE.TXT for details. 75f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 85f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 95f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// This file implements the Parser interfaces. 115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Parse/Parser.h" 15e4858a65a93fb36c099d8dd2ea0a98e33e77687eDaniel Dunbar#include "clang/Basic/Diagnostic.h" 165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Parse/DeclSpec.h" 175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Parse/Scope.h" 18c46d1a1f8af67a87689d7db9eaf96027282ccaeaChris Lattner#include "ExtensionRAIIObject.h" 19fcdd8fe26de3eee44927600bf1853e21bd90dd84Daniel Dunbar#include "ParsePragma.h" 205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace clang; 215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerParser::Parser(Preprocessor &pp, Action &actions) 235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer : PP(pp), Actions(actions), Diags(PP.getDiagnostics()) { 245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Tok.setKind(tok::eof); 255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer CurScope = 0; 269e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner NumCachedScopes = 0; 275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParenCount = BracketCount = BraceCount = 0; 28a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCImpDecl = 0; 29fcdd8fe26de3eee44927600bf1853e21bd90dd84Daniel Dunbar 30fcdd8fe26de3eee44927600bf1853e21bd90dd84Daniel Dunbar // Add #pragma handlers. These are removed and destroyed in the 31fcdd8fe26de3eee44927600bf1853e21bd90dd84Daniel Dunbar // destructor. 32fcdd8fe26de3eee44927600bf1853e21bd90dd84Daniel Dunbar PackHandler = 33fcdd8fe26de3eee44927600bf1853e21bd90dd84Daniel Dunbar new PragmaPackHandler(&PP.getIdentifierTable().get("pack"), actions); 34fcdd8fe26de3eee44927600bf1853e21bd90dd84Daniel Dunbar PP.AddPragmaHandler(0, PackHandler); 35fcdd8fe26de3eee44927600bf1853e21bd90dd84Daniel Dunbar 364cc18a4d5222e04bd568b1e3e4d86127dbbcdf3fArgyrios Kyrtzidis // Instantiate a LexedMethodsForTopClass for all the non-nested classes. 374cc18a4d5222e04bd568b1e3e4d86127dbbcdf3fArgyrios Kyrtzidis PushTopClassStack(); 385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// Out-of-line virtual destructor to provide home for Action class. 417f792faf0cee47fa1ea304bd7a7f502c0e5bbc9aSebastian RedlActionBase::~ActionBase() {} 427f792faf0cee47fa1ea304bd7a7f502c0e5bbc9aSebastian Redl 437f792faf0cee47fa1ea304bd7a7f502c0e5bbc9aSebastian Redl/// Out-of-line virtual destructor to provide home for Action class. 445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerAction::~Action() {} 455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 473cbfe2c4159e0a219ae660d50625c013aa4afbd0Chris LattnerDiagnosticBuilder Parser::Diag(SourceLocation Loc, unsigned DiagID) { 481ab3b96de160e4fbffec2a776e284a48a3bb543dChris Lattner return Diags.Report(FullSourceLoc(Loc,PP.getSourceManager()), DiagID); 491ab3b96de160e4fbffec2a776e284a48a3bb543dChris Lattner} 501ab3b96de160e4fbffec2a776e284a48a3bb543dChris Lattner 513cbfe2c4159e0a219ae660d50625c013aa4afbd0Chris LattnerDiagnosticBuilder Parser::Diag(const Token &Tok, unsigned DiagID) { 521ab3b96de160e4fbffec2a776e284a48a3bb543dChris Lattner return Diag(Tok.getLocation(), DiagID); 535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// MatchRHSPunctuation - For punctuation with a LHS and RHS (e.g. '['/']'), 565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// this helper function matches and consumes the specified RHS token if 575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// present. If not present, it emits the specified diagnostic indicating 585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// that the parser failed to match the RHS of the token at LHSLoc. LHSName 595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// should be the name of the unmatched LHS token. 605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerSourceLocation Parser::MatchRHSPunctuation(tok::TokenKind RHSTok, 615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation LHSLoc) { 62a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 63000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(RHSTok)) 645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return ConsumeAnyToken(); 65a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation R = Tok.getLocation(); 675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const char *LHSName = "unknown"; 685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer diag::kind DID = diag::err_parse_error; 695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (RHSTok) { 705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: break; 715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_paren : LHSName = "("; DID = diag::err_expected_rparen; break; 725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_brace : LHSName = "{"; DID = diag::err_expected_rbrace; break; 735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_square: LHSName = "["; DID = diag::err_expected_rsquare; break; 745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::greater: LHSName = "<"; DID = diag::err_expected_greater; break; 755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, DID); 7728eb7e992b9a266abb300da25b6d3c1557cec361Chris Lattner Diag(LHSLoc, diag::note_matching) << LHSName; 785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(RHSTok); 795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return R; 805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ExpectAndConsume - The parser expects that 'ExpectedTok' is next in the 835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// input. If so, it is consumed and false is returned. 845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// If the input is malformed, this emits the specified diagnostic. Next, if 865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// SkipToTok is specified, it calls SkipUntil(SkipToTok). Finally, true is 875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// returned. 885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerbool Parser::ExpectAndConsume(tok::TokenKind ExpectedTok, unsigned DiagID, 895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const char *Msg, tok::TokenKind SkipToTok) { 90000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(ExpectedTok)) { 915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeAnyToken(); 925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 94a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 951ab3b96de160e4fbffec2a776e284a48a3bb543dChris Lattner Diag(Tok, DiagID) << Msg; 965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (SkipToTok != tok::unknown) 975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(SkipToTok); 985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return true; 995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 1025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// Error recovery. 1035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 1045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// SkipUntil - Read tokens until we get to the specified token, then consume 106012cf464254804279efa84e21b4b493dde76c5f1Chris Lattner/// it (unless DontConsume is true). Because we cannot guarantee that the 1075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// token will ever occur, this skips to the next token, or to some likely 1085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// good stopping point. If StopAtSemi is true, skipping will stop at a ';' 1095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// character. 110a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump/// 1115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// If SkipUntil finds the specified token, it returns true, otherwise it 112a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump/// returns false. 1135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerbool Parser::SkipUntil(const tok::TokenKind *Toks, unsigned NumToks, 1145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool StopAtSemi, bool DontConsume) { 1155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // We always want this function to skip at least one token if the first token 1165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // isn't T and if not at EOF. 1175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool isFirstTokenSkipped = true; 1185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer while (1) { 1195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If we found one of the tokens, stop and return true. 1205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 0; i != NumToks; ++i) { 121000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(Toks[i])) { 1225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (DontConsume) { 1235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Noop, don't consume the token. 1245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 1255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeAnyToken(); 1265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return true; 1285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 130a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 1315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (Tok.getKind()) { 1325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::eof: 1335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Ran out of tokens. 1345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 135a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 1365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::l_paren: 1375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Recursively skip properly-nested parens. 1385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeParen(); 1395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::r_paren, false); 1405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::l_square: 1425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Recursively skip properly-nested square brackets. 1435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeBracket(); 1445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::r_square, false); 1455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::l_brace: 1475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Recursively skip properly-nested braces. 1485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeBrace(); 1495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::r_brace, false); 1505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 151a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 1525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Okay, we found a ']' or '}' or ')', which we think should be balanced. 1535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Since the user wasn't looking for this token (if they were, it would 1545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // already be handled), this isn't balanced. If there is a LHS token at a 1555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // higher level, we will assume that this matches the unbalanced token 1565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // and return it. Otherwise, this is a spurious RHS token, which we skip. 1575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_paren: 1585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (ParenCount && !isFirstTokenSkipped) 1595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; // Matches something. 1605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeParen(); 1615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_square: 1635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (BracketCount && !isFirstTokenSkipped) 1645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; // Matches something. 1655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeBracket(); 1665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_brace: 1685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (BraceCount && !isFirstTokenSkipped) 1695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; // Matches something. 1705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeBrace(); 1715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 172a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 1735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::string_literal: 1745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::wide_string_literal: 1755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeStringToken(); 1765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::semi: 1785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (StopAtSemi) 1795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 1805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // FALL THROUGH. 1815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: 1825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Skip this token. 1835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 1845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer isFirstTokenSkipped = false; 187a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump } 1885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 1915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// Scope manipulation 1925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 1935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// EnterScope - Start a new scope. 1955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Parser::EnterScope(unsigned ScopeFlags) { 1969e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner if (NumCachedScopes) { 1979e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner Scope *N = ScopeCache[--NumCachedScopes]; 1985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer N->Init(CurScope, ScopeFlags); 1995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer CurScope = N; 2005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 2015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer CurScope = new Scope(CurScope, ScopeFlags); 2025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ExitScope - Pop a scope off the scope stack. 2065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Parser::ExitScope() { 2075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(CurScope && "Scope imbalance!"); 2085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 20990ae68aae98f12fe1950c63e2f6bd0fabce6cb1eChris Lattner // Inform the actions module that this scope is going away if there are any 21090ae68aae98f12fe1950c63e2f6bd0fabce6cb1eChris Lattner // decls in it. 21190ae68aae98f12fe1950c63e2f6bd0fabce6cb1eChris Lattner if (!CurScope->decl_empty()) 212b216c8861c60af9c56c900a485233255c4452df2Steve Naroff Actions.ActOnPopScope(Tok.getLocation(), CurScope); 213a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 2149e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner Scope *OldScope = CurScope; 2159e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner CurScope = OldScope->getParent(); 216a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 2179e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner if (NumCachedScopes == ScopeCacheSize) 2189e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner delete OldScope; 2195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer else 2209e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner ScopeCache[NumCachedScopes++] = OldScope; 2215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 2275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// C99 6.9: External Definitions. 2285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 2295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerParser::~Parser() { 2315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If we still have scopes active, delete the scope tree. 2325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer delete CurScope; 233a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 2345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Free the scope cache. 2359e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner for (unsigned i = 0, e = NumCachedScopes; i != e; ++i) 2369e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner delete ScopeCache[i]; 237fcdd8fe26de3eee44927600bf1853e21bd90dd84Daniel Dunbar 238fcdd8fe26de3eee44927600bf1853e21bd90dd84Daniel Dunbar // Remove the pragma handlers we installed. 239fcdd8fe26de3eee44927600bf1853e21bd90dd84Daniel Dunbar PP.RemovePragmaHandler(0, PackHandler); 240fcdd8fe26de3eee44927600bf1853e21bd90dd84Daniel Dunbar delete PackHandler; 2415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// Initialize - Warm up the parser. 2445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 2455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Parser::Initialize() { 2465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Prime the lexer look-ahead. 2475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 248a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 24931e057270232c1c37602579cb6461c2704175672Chris Lattner // Create the translation unit scope. Install it as the current scope. 2505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(CurScope == 0 && "A scope is already active?"); 25131e057270232c1c37602579cb6461c2704175672Chris Lattner EnterScope(Scope::DeclScope); 252b216c8861c60af9c56c900a485233255c4452df2Steve Naroff Actions.ActOnTranslationUnitScope(Tok.getLocation(), CurScope); 253a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 254000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::eof) && 255f72617544287acf0281c3b1a733bcb22a02e6ca4Chris Lattner !getLang().CPlusPlus) // Empty source file is an extension in C 2565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::ext_empty_source_file); 257a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 25834870da70fa42b0391b79627ebd0cfc6eb22213bChris Lattner // Initialization for Objective-C context sensitive keywords recognition. 259a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek // Referenced in Parser::ParseObjCTypeQualifierList. 26034870da70fa42b0391b79627ebd0cfc6eb22213bChris Lattner if (getLang().ObjC1) { 261a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_in] = &PP.getIdentifierTable().get("in"); 262a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_out] = &PP.getIdentifierTable().get("out"); 263a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_inout] = &PP.getIdentifierTable().get("inout"); 264a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_oneway] = &PP.getIdentifierTable().get("oneway"); 265a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_bycopy] = &PP.getIdentifierTable().get("bycopy"); 266a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_byref] = &PP.getIdentifierTable().get("byref"); 26734870da70fa42b0391b79627ebd0cfc6eb22213bChris Lattner } 268662e8b5647adbb1bc9eeceece7b64600cfa87471Daniel Dunbar 269662e8b5647adbb1bc9eeceece7b64600cfa87471Daniel Dunbar Ident_super = &PP.getIdentifierTable().get("super"); 2705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseTopLevelDecl - Parse one top-level declaration, return whatever the 2735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// action tells us to. This returns true if the EOF was encountered. 27489307ffaf8acf4d6fdffd72b607ca4fbcfdffc9dSteve Naroffbool Parser::ParseTopLevelDecl(DeclTy*& Result) { 27589307ffaf8acf4d6fdffd72b607ca4fbcfdffc9dSteve Naroff Result = 0; 2769299f3fa85796613cc787a2062c9562d07c8613eChris Lattner if (Tok.is(tok::eof)) { 2779299f3fa85796613cc787a2062c9562d07c8613eChris Lattner Actions.ActOnEndOfTranslationUnit(); 2789299f3fa85796613cc787a2062c9562d07c8613eChris Lattner return true; 2799299f3fa85796613cc787a2062c9562d07c8613eChris Lattner } 280a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 28189307ffaf8acf4d6fdffd72b607ca4fbcfdffc9dSteve Naroff Result = ParseExternalDeclaration(); 2825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 2835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseTranslationUnit: 2865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// translation-unit: [C99 6.9] 287a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump/// external-declaration 288a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump/// translation-unit external-declaration 2895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Parser::ParseTranslationUnit() { 290a9e8fec80088f4e176d80b84bddddfbc9ab0f548Chris Lattner Initialize(); // pushes a scope. 291a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 29289307ffaf8acf4d6fdffd72b607ca4fbcfdffc9dSteve Naroff DeclTy *Res; 29389307ffaf8acf4d6fdffd72b607ca4fbcfdffc9dSteve Naroff while (!ParseTopLevelDecl(Res)) 2945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /*parse them all*/; 29506f548596beef4c0a227a45cba996497f99566c0Chris Lattner 29606f548596beef4c0a227a45cba996497f99566c0Chris Lattner ExitScope(); 29706f548596beef4c0a227a45cba996497f99566c0Chris Lattner assert(CurScope == 0 && "Scope imbalance!"); 2985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseExternalDeclaration: 30190b93d6f6961edd8f17e089253d655892adc1ef7Chris Lattner/// 302c19923dda3d28f67aab4726cd40bb07032758383Douglas Gregor/// external-declaration: [C99 6.9], declaration: [C++ dcl.dcl] 303c3018153a11afe91849748a93d920040a571b76cChris Lattner/// function-definition 304c3018153a11afe91849748a93d920040a571b76cChris Lattner/// declaration 3055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [EXT] ';' 3065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [GNU] asm-definition 307c3018153a11afe91849748a93d920040a571b76cChris Lattner/// [GNU] __extension__ external-declaration 3085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] objc-class-definition 3095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] objc-class-declaration 3105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] objc-alias-declaration 3115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] objc-protocol-definition 3125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] objc-method-definition 3135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] @end 314c19923dda3d28f67aab4726cd40bb07032758383Douglas Gregor/// [C++] linkage-specification 3155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [GNU] asm-definition: 3165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// simple-asm-expr ';' 3175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 3185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerParser::DeclTy *Parser::ParseExternalDeclaration() { 3195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (Tok.getKind()) { 3205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::semi: 3215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::ext_top_level_semi); 3225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 3235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // TODO: Invoke action for top-level semicolon. 3245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return 0; 32590b93d6f6961edd8f17e089253d655892adc1ef7Chris Lattner case tok::r_brace: 32690b93d6f6961edd8f17e089253d655892adc1ef7Chris Lattner Diag(Tok, diag::err_expected_external_declaration); 32790b93d6f6961edd8f17e089253d655892adc1ef7Chris Lattner ConsumeBrace(); 32890b93d6f6961edd8f17e089253d655892adc1ef7Chris Lattner return 0; 32990b93d6f6961edd8f17e089253d655892adc1ef7Chris Lattner case tok::eof: 33090b93d6f6961edd8f17e089253d655892adc1ef7Chris Lattner Diag(Tok, diag::err_expected_external_declaration); 33190b93d6f6961edd8f17e089253d655892adc1ef7Chris Lattner return 0; 332c3018153a11afe91849748a93d920040a571b76cChris Lattner case tok::kw___extension__: { 333c46d1a1f8af67a87689d7db9eaf96027282ccaeaChris Lattner // __extension__ silences extension warnings in the subexpression. 334c46d1a1f8af67a87689d7db9eaf96027282ccaeaChris Lattner ExtensionRAIIObject O(Diags); // Use RAII to do this. 33539146d6497ad5e7ca8ef639221e7b3e15d07c888Chris Lattner ConsumeToken(); 336c46d1a1f8af67a87689d7db9eaf96027282ccaeaChris Lattner return ParseExternalDeclaration(); 337c3018153a11afe91849748a93d920040a571b76cChris Lattner } 338dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson case tok::kw_asm: { 339effa8d1c97b00a3f53e972b0e61d9aade5ea1c57Sebastian Redl OwningExprResult Result(ParseSimpleAsm()); 340a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 3413f9424f3206b834b5dd0e7c403348651ab6fafbbAnders Carlsson ExpectAndConsume(tok::semi, diag::err_expected_semi_after, 3423f9424f3206b834b5dd0e7c403348651ab6fafbbAnders Carlsson "top-level asm block"); 343dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson 3440e9eabca263e8922bec0e2b38c8670eba9a39a1fSebastian Redl if (!Result.isInvalid()) 345effa8d1c97b00a3f53e972b0e61d9aade5ea1c57Sebastian Redl return Actions.ActOnFileScopeAsmDecl(Tok.getLocation(), Result.release()); 346aec3a1eb215445e63ba5702f8d6b1e0f2e8c27b9Chris Lattner return 0; 347dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson } 3485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::at: 3495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // @ is not a legal token unless objc is enabled, no need to check. 3502bd42fadafddc8acf744b57a970bdc96a077c617Steve Naroff return ParseObjCAtDirectives(); 3515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::minus: 3525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::plus: 35360fbca0b027ff5a6579f16cb6e3abab826e0d967Fariborz Jahanian if (getLang().ObjC1) 35471c0a951d08dc7a2a057df8c15f22b36f6aa47c7Steve Naroff return ParseObjCMethodDefinition(); 35560fbca0b027ff5a6579f16cb6e3abab826e0d967Fariborz Jahanian else { 3565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_expected_external_declaration); 3575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 3585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return 0; 3608f08cb7d0b97786b17ef05e05caa55aad4d6bd39Chris Lattner case tok::kw_namespace: 3615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::kw_typedef: 362adcac8824a9cff13f1ef61a69e38c1041cba12eeDouglas Gregor case tok::kw_template: 363adcac8824a9cff13f1ef61a69e38c1041cba12eeDouglas Gregor case tok::kw_export: // As in 'export template' 364bae35118fc5cea2da08567dbb9763af7f906dae2Chris Lattner // A function definition cannot start with a these keywords. 3655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return ParseDeclaration(Declarator::FileContext); 36690b93d6f6961edd8f17e089253d655892adc1ef7Chris Lattner 3675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: 3685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // We can't tell whether this is a function-definition or declaration yet. 3695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return ParseDeclarationOrFunctionDefinition(); 3705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 3725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseDeclarationOrFunctionDefinition - Parse either a function-definition or 3745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// a declaration. We can't tell which we have until we read up to the 3755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// compound-statement in function-definition. 3765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 3775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// function-definition: [C99 6.9.1] 378a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// decl-specs declarator declaration-list[opt] compound-statement 379a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// [C90] function-definition: [C99 6.7.1] - implicit int result 380a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump/// [C90] decl-specs[opt] declarator declaration-list[opt] compound-statement 381a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// 3825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// declaration: [C99 6.7] 383697e15f2a028f8997cccb24ecd05099988cfb1a9Chris Lattner/// declaration-specifiers init-declarator-list[opt] ';' 384697e15f2a028f8997cccb24ecd05099988cfb1a9Chris Lattner/// [!C99] init-declarator-list ';' [TODO: warn in c99 mode] 3855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OMP] threadprivate-directive [TODO] 3865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 3875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerParser::DeclTy *Parser::ParseDeclarationOrFunctionDefinition() { 3885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the common declaration-specifiers piece. 3895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DeclSpec DS; 3905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParseDeclarationSpecifiers(DS); 391a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 3925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.7.2.3p6: Handle "struct-or-union identifier;", "enum { X };" 3935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // declaration-specifiers init-declarator-list[opt] ';' 394000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::semi)) { 3955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 3965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return Actions.ParsedFreeStandingDeclSpec(CurScope, DS); 3975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 398a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 399246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar // ObjC2 allows prefix attributes on class interfaces and protocols. 400246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar // FIXME: This still needs better diagnostics. We should only accept 401246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar // attributes here, no types, etc. 402000732226610650837478cba97843d19b75f648eChris Lattner if (getLang().ObjC2 && Tok.is(tok::at)) { 403dac269b65eed82182fc3e96566dedd6562dfe11eSteve Naroff SourceLocation AtLoc = ConsumeToken(); // the "@" 404246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar if (!Tok.isObjCAtKeyword(tok::objc_interface) && 405246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar !Tok.isObjCAtKeyword(tok::objc_protocol)) { 406246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar Diag(Tok, diag::err_objc_unexpected_attr); 407cb53b361bce341c8591333c6997f62e480acc0b4Chris Lattner SkipUntil(tok::semi); // FIXME: better skip? 408cb53b361bce341c8591333c6997f62e480acc0b4Chris Lattner return 0; 409cb53b361bce341c8591333c6997f62e480acc0b4Chris Lattner } 4100de2ae28c603322f05e2d9200c7d457c8b928983Fariborz Jahanian const char *PrevSpec = 0; 4110de2ae28c603322f05e2d9200c7d457c8b928983Fariborz Jahanian if (DS.SetTypeSpecType(DeclSpec::TST_unspecified, AtLoc, PrevSpec)) 4121ab3b96de160e4fbffec2a776e284a48a3bb543dChris Lattner Diag(AtLoc, diag::err_invalid_decl_spec_combination) << PrevSpec; 413246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar if (Tok.isObjCAtKeyword(tok::objc_protocol)) 414246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar return ParseObjCAtProtocolDeclaration(AtLoc, DS.getAttributes()); 415a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump return ParseObjCAtInterfaceDeclaration(AtLoc, DS.getAttributes()); 416dac269b65eed82182fc3e96566dedd6562dfe11eSteve Naroff } 417a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 418c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner // If the declspec consisted only of 'extern' and we have a string 419c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner // literal following it, this must be a C++ linkage specifier like 420c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner // 'extern "C"'. 4213c6f6a7a1bb9969112617a26d2333bab2f6efd65Chris Lattner if (Tok.is(tok::string_literal) && getLang().CPlusPlus && 422c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner DS.getStorageClassSpec() == DeclSpec::SCS_extern && 423c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner DS.getParsedSpecifiers() == DeclSpec::PQ_StorageClassSpecifier) 424c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner return ParseLinkage(Declarator::FileContext); 425c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner 4265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the first declarator. 4275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Declarator DeclaratorInfo(DS, Declarator::FileContext); 4285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParseDeclarator(DeclaratorInfo); 4295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Error parsing the declarator? 43010bd36882406cdf4805e35add1ce2f11ab9ae152Douglas Gregor if (!DeclaratorInfo.hasName()) { 4315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If so, skip until the semi-colon or a }. 432cb43d999520f547d682a1ca280ecfedb115ee1fdDouglas Gregor SkipUntil(tok::r_brace, true, true); 433000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::semi)) 4345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 4355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return 0; 4365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 4375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If the declarator is the start of a function definition, handle it. 439000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::equal) || // int X()= -> not a function def 440000732226610650837478cba97843d19b75f648eChris Lattner Tok.is(tok::comma) || // int X(), -> not a function def 441000732226610650837478cba97843d19b75f648eChris Lattner Tok.is(tok::semi) || // int X(); -> not a function def 442000732226610650837478cba97843d19b75f648eChris Lattner Tok.is(tok::kw_asm) || // int X() __asm__ -> not a function def 44373a0d889eda0f000a441319e39540509175b8e81Argyrios Kyrtzidis Tok.is(tok::kw___attribute) || // int X() __attr__ -> not a function def 44473a0d889eda0f000a441319e39540509175b8e81Argyrios Kyrtzidis (getLang().CPlusPlus && 44573a0d889eda0f000a441319e39540509175b8e81Argyrios Kyrtzidis Tok.is(tok::l_paren)) ) { // int X(0) -> not a function def [C++] 4465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // FALL THROUGH. 4475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else if (DeclaratorInfo.isFunctionDeclarator() && 448cf28c72980746707e25a833426315187534d41fcArgyrios Kyrtzidis (Tok.is(tok::l_brace) || // int X() {} 449cf28c72980746707e25a833426315187534d41fcArgyrios Kyrtzidis ( !getLang().CPlusPlus && 450cf28c72980746707e25a833426315187534d41fcArgyrios Kyrtzidis isDeclarationSpecifier() ))) { // int X(f) int f; {} 451e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff if (DS.getStorageClassSpec() == DeclSpec::SCS_typedef) { 452e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff Diag(Tok, diag::err_function_declared_typedef); 453a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 454e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff if (Tok.is(tok::l_brace)) { 455e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff // This recovery skips the entire function body. It would be nice 45672c3f314d92d65c050ee1c07b7753623c044d6c7Douglas Gregor // to simply call ParseFunctionDefinition() below, however Sema 457e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff // assumes the declarator represents a function, not a typedef. 458e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff ConsumeBrace(); 459e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff SkipUntil(tok::r_brace, true); 460e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff } else { 461e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff SkipUntil(tok::semi); 462e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff } 463e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff return 0; 464e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff } 4655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return ParseFunctionDefinition(DeclaratorInfo); 4665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 4675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (DeclaratorInfo.isFunctionDeclarator()) 4685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_expected_fn_body); 4695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer else 4705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_expected_after_declarator); 4715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::semi); 4725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return 0; 4735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 4745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the init-declarator-list for a normal declaration. 4765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return ParseInitDeclaratorListAfterFirstDeclarator(DeclaratorInfo); 4775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 4785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseFunctionDefinition - We parsed and verified that the specified 4805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// Declarator is well formed. If this is a K&R-style function, read the 4815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// parameters declaration-list, then start the compound-statement. 4825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 483a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// function-definition: [C99 6.9.1] 484a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// decl-specs declarator declaration-list[opt] compound-statement 485a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// [C90] function-definition: [C99 6.7.1] - implicit int result 486a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump/// [C90] decl-specs[opt] declarator declaration-list[opt] compound-statement 4877ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor/// [C++] function-definition: [C++ 8.4] 4887ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor/// decl-specifier-seq[opt] declarator ctor-initializer[opt] function-body 4897ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor/// [C++] function-definition: [C++ 8.4] 4907ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor/// decl-specifier-seq[opt] declarator function-try-block [TODO] 4915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 4925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerParser::DeclTy *Parser::ParseFunctionDefinition(Declarator &D) { 4935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const DeclaratorChunk &FnTypeInfo = D.getTypeObject(0); 4945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(FnTypeInfo.Kind == DeclaratorChunk::Function && 4955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer "This isn't a function declarator!"); 4965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const DeclaratorChunk::FunctionTypeInfo &FTI = FnTypeInfo.Fun; 497a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 498a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner // If this is C90 and the declspecs were completely missing, fudge in an 499a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner // implicit int. We do this here because this is the only place where 500a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner // declaration-specifiers are completely optional in the grammar. 501d658b562e80d6ef7a1118e34ff12802c6e2fccedChris Lattner if (getLang().ImplicitInt && D.getDeclSpec().getParsedSpecifiers() == 0) { 502a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner const char *PrevSpec; 50331c286803c60c59d314525e047d0e72f9a1cb55bChris Lattner D.getMutableDeclSpec().SetTypeSpecType(DeclSpec::TST_int, 50431c286803c60c59d314525e047d0e72f9a1cb55bChris Lattner D.getIdentifierLoc(), 50531c286803c60c59d314525e047d0e72f9a1cb55bChris Lattner PrevSpec); 506a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner } 507a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 5085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this declaration was formed with a K&R-style identifier list for the 5095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // arguments, parse declarations for all of the args next. 5105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // int foo(a,b) int a; float b; {} 5115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!FTI.hasPrototype && FTI.NumArgs != 0) 5125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParseKNRParamDeclarations(D); 5135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5147ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor // We should have either an opening brace or, in a C++ constructor, 5157ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor // we may have a colon. 516618e5c04702b156d75aa2636232ef8430912abdcSebastian Redl // FIXME: In C++, we might also find the 'try' keyword. 5177ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor if (Tok.isNot(tok::l_brace) && Tok.isNot(tok::colon)) { 5185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_expected_fn_body); 5195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Skip over garbage, until we get to '{'. Don't eat the '{'. 5215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::l_brace, true, true); 522a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 5235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If we didn't find the '{', bail out. 524000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.isNot(tok::l_brace)) 5255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return 0; 5265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 527a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 528b652cea7d7b70ebe3744fb6d72c9ad9cf3c95429Chris Lattner // Enter a scope for the function body. 529b652cea7d7b70ebe3744fb6d72c9ad9cf3c95429Chris Lattner EnterScope(Scope::FnScope|Scope::DeclScope); 530a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 531b652cea7d7b70ebe3744fb6d72c9ad9cf3c95429Chris Lattner // Tell the actions module that we have entered a function definition with the 532b652cea7d7b70ebe3744fb6d72c9ad9cf3c95429Chris Lattner // specified Declarator for the function. 533b652cea7d7b70ebe3744fb6d72c9ad9cf3c95429Chris Lattner DeclTy *Res = Actions.ActOnStartOfFunctionDef(CurScope, D); 534a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 5357ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor // If we have a colon, then we're probably parsing a C++ 5367ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor // ctor-initializer. 5377ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor if (Tok.is(tok::colon)) 5387ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor ParseConstructorInitializer(Res); 5397ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor 5407ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor SourceLocation BraceLoc = Tok.getLocation(); 541a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump return ParseFunctionStatementBody(Res, BraceLoc, BraceLoc); 5425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 5435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseKNRParamDeclarations - Parse 'declaration-list[opt]' which provides 5455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// types for a function with a K&R-style identifier list for arguments. 5465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Parser::ParseKNRParamDeclarations(Declarator &D) { 5475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // We know that the top-level of this declarator is a function. 5485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DeclaratorChunk::FunctionTypeInfo &FTI = D.getTypeObject(0).Fun; 5495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 55004421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner // Enter function-declaration scope, limiting any declarators to the 55104421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner // function prototype scope, including parameter declarators. 5526e33dd5b5cbaddadd54bebe07c8397844365d885Eli Friedman EnterScope(Scope::FnScope|Scope::DeclScope); 55304421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner 5545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Read all the argument declarations. 5555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer while (isDeclarationSpecifier()) { 5565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation DSStart = Tok.getLocation(); 557a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 5585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the common declaration-specifiers piece. 5595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DeclSpec DS; 5605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParseDeclarationSpecifiers(DS); 561a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 5625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.9.1p6: 'each declaration in the declaration list shall have at 5635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // least one declarator'. 5645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // NOTE: GCC just makes this an ext-warn. It's not clear what it does with 5655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // the declarations though. It's trivial to ignore them, really hard to do 5665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // anything else with them. 567000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::semi)) { 5685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(DSStart, diag::err_declaration_does_not_declare_param); 5695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 5705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer continue; 5715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 572a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 5735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.9.1p6: Declarations shall contain no storage-class specifiers other 5745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // than register. 5755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (DS.getStorageClassSpec() != DeclSpec::SCS_unspecified && 5765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DS.getStorageClassSpec() != DeclSpec::SCS_register) { 5775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(DS.getStorageClassSpecLoc(), 5785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer diag::err_invalid_storage_class_in_func_decl); 5795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DS.ClearStorageClassSpecs(); 5805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 5815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (DS.isThreadSpecified()) { 5825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(DS.getThreadSpecLoc(), 5835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer diag::err_invalid_storage_class_in_func_decl); 5845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DS.ClearStorageClassSpecs(); 5855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 586a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 5875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the first declarator attached to this declspec. 5885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Declarator ParmDeclarator(DS, Declarator::KNRTypeListContext); 5895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParseDeclarator(ParmDeclarator); 5905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Handle the full declarator list. 5925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer while (1) { 5935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DeclTy *AttrList; 5945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If attributes are present, parse them. 595000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::kw___attribute)) 5965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // FIXME: attach attributes too. 5975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer AttrList = ParseAttributes(); 598a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 5995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Ask the actions module to compute the type for this declarator. 600a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump Action::DeclTy *Param = 60104421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner Actions.ActOnParamDeclarator(CurScope, ParmDeclarator); 6022bd42fadafddc8acf744b57a970bdc96a077c617Steve Naroff 603a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump if (Param && 6045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // A missing identifier has already been diagnosed. 6055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParmDeclarator.getIdentifier()) { 6065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Scan the argument list looking for the correct param to apply this 6085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // type. 6095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 0; ; ++i) { 6105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.9.1p6: those declarators shall declare only identifiers from 6115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // the identifier list. 6125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (i == FTI.NumArgs) { 6131ab3b96de160e4fbffec2a776e284a48a3bb543dChris Lattner Diag(ParmDeclarator.getIdentifierLoc(), diag::err_no_matching_param) 6146898e33d0b28346a4dbe9a666e0e4188fea80460Chris Lattner << ParmDeclarator.getIdentifier(); 6155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 6165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 617a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 6185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (FTI.ArgInfo[i].Ident == ParmDeclarator.getIdentifier()) { 6195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Reject redefinitions of parameters. 62004421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner if (FTI.ArgInfo[i].Param) { 6215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(ParmDeclarator.getIdentifierLoc(), 6221ab3b96de160e4fbffec2a776e284a48a3bb543dChris Lattner diag::err_param_redefinition) 6236898e33d0b28346a4dbe9a666e0e4188fea80460Chris Lattner << ParmDeclarator.getIdentifier(); 6245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 62504421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner FTI.ArgInfo[i].Param = Param; 6265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 6285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If we don't have a comma, it is either the end of the list (a ';') or 6335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // an error, bail out. 634000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.isNot(tok::comma)) 6355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 636a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 6375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Consume the comma. 6385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 639a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 6405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the next declarator. 6415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParmDeclarator.clear(); 6425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParseDeclarator(ParmDeclarator); 6435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 644a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 645000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::semi)) { 6465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 6475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 6485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_parse_error); 6495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Skip to end of block or statement 6505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::semi, true); 651000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::semi)) 6525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 6535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 655a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 65604421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner // Leave prototype scope. 65704421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner ExitScope(); 65804421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner 6595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // The actions module must verify that all arguments were declared. 6605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 6615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseAsmStringLiteral - This is just a normal string-literal, but is not 6645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// allowed to be a wide string, and is not subject to character translation. 6655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 6665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [GNU] asm-string-literal: 6675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// string-literal 6685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 669effa8d1c97b00a3f53e972b0e61d9aade5ea1c57Sebastian RedlParser::OwningExprResult Parser::ParseAsmStringLiteral() { 6705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!isTokenStringLiteral()) { 6715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_expected_string_literal); 672effa8d1c97b00a3f53e972b0e61d9aade5ea1c57Sebastian Redl return OwningExprResult(true); 6735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 674a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 67515faa7fdfb496489dec9470aa5eb699b29ecdaccSebastian Redl OwningExprResult Res(Actions, ParseStringLiteralExpression()); 676effa8d1c97b00a3f53e972b0e61d9aade5ea1c57Sebastian Redl if (Res.isInvalid()) return move(Res); 677a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 6785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // TODO: Diagnose: wide string literal in 'asm' 679a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 680effa8d1c97b00a3f53e972b0e61d9aade5ea1c57Sebastian Redl return move(Res); 6815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 6825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseSimpleAsm 6845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 6855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [GNU] simple-asm-expr: 6865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 'asm' '(' asm-string-literal ')' 6875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 688effa8d1c97b00a3f53e972b0e61d9aade5ea1c57Sebastian RedlParser::OwningExprResult Parser::ParseSimpleAsm() { 689000732226610650837478cba97843d19b75f648eChris Lattner assert(Tok.is(tok::kw_asm) && "Not an asm!"); 690dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson SourceLocation Loc = ConsumeToken(); 691a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 692000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.isNot(tok::l_paren)) { 6931ab3b96de160e4fbffec2a776e284a48a3bb543dChris Lattner Diag(Tok, diag::err_expected_lparen_after) << "asm"; 694effa8d1c97b00a3f53e972b0e61d9aade5ea1c57Sebastian Redl return OwningExprResult(true); 6955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 696a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 697dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson ConsumeParen(); 698a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 699effa8d1c97b00a3f53e972b0e61d9aade5ea1c57Sebastian Redl OwningExprResult Result(ParseAsmStringLiteral()); 700a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 7010e9eabca263e8922bec0e2b38c8670eba9a39a1fSebastian Redl if (Result.isInvalid()) 702a80f8749f2968d19595ca2544114932bf0ca2c11Daniel Dunbar SkipUntil(tok::r_paren); 7038f5421a2cfaff0b5ef93a4116f697ed98ce08828Chris Lattner else 704a80f8749f2968d19595ca2544114932bf0ca2c11Daniel Dunbar MatchRHSPunctuation(tok::r_paren, Loc); 705a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 706effa8d1c97b00a3f53e972b0e61d9aade5ea1c57Sebastian Redl return move(Result); 7075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 7085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 709eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// TryAnnotateTypeOrScopeToken - If the current token position is on a 710eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// typename (possibly qualified in C++) or a C++ scope specifier not followed 711eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// by a typename, TryAnnotateTypeOrScopeToken will replace one or more tokens 712eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// with a single annotation token representing the typename or C++ scope 713eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// respectively. 714eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// This simplifies handling of C++ scope specifiers and allows efficient 715eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// backtracking without the need to re-parse and resolve nested-names and 716eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// typenames. 71744802cc435d5122701e4f1a9354381cff4b171c0Argyrios Kyrtzidis/// It will mainly be called when we expect to treat identifiers as typenames 71844802cc435d5122701e4f1a9354381cff4b171c0Argyrios Kyrtzidis/// (if they are typenames). For example, in C we do not expect identifiers 71944802cc435d5122701e4f1a9354381cff4b171c0Argyrios Kyrtzidis/// inside expressions to be treated as typenames so it will not be called 72044802cc435d5122701e4f1a9354381cff4b171c0Argyrios Kyrtzidis/// for expressions in C. 72144802cc435d5122701e4f1a9354381cff4b171c0Argyrios Kyrtzidis/// The benefit for C/ObjC is that a typename will be annotated and 72244802cc435d5122701e4f1a9354381cff4b171c0Argyrios Kyrtzidis/// Actions.isTypeName will not be needed to be called again (e.g. isTypeName 72344802cc435d5122701e4f1a9354381cff4b171c0Argyrios Kyrtzidis/// will not be called twice, once to check whether we have a declaration 72444802cc435d5122701e4f1a9354381cff4b171c0Argyrios Kyrtzidis/// specifier, and another one to get the actual type inside 72544802cc435d5122701e4f1a9354381cff4b171c0Argyrios Kyrtzidis/// ParseDeclarationSpecifiers). 726eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidisvoid Parser::TryAnnotateTypeOrScopeToken() { 727eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis if (Tok.is(tok::annot_qualtypename) || Tok.is(tok::annot_cxxscope)) 728eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis return; 729eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis 730eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis CXXScopeSpec SS; 7314bdd91c09fd59e0c154d759288beff300e31e1d0Argyrios Kyrtzidis if (getLang().CPlusPlus) 7324bdd91c09fd59e0c154d759288beff300e31e1d0Argyrios Kyrtzidis MaybeParseCXXScopeSpecifier(SS); 733eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis 734eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis if (Tok.is(tok::identifier)) { 735eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis TypeTy *Ty = Actions.isTypeName(*Tok.getIdentifierInfo(), CurScope, &SS); 736eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis if (Ty) { 737eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis // This is a typename. Replace the current token in-place with an 738eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis // annotation type token. 739eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis Tok.setKind(tok::annot_qualtypename); 740eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis Tok.setAnnotationValue(Ty); 741eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis Tok.setAnnotationEndLoc(Tok.getLocation()); 742eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis if (SS.isNotEmpty()) // it was a C++ qualified type name. 743eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis Tok.setLocation(SS.getBeginLoc()); 744eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis 745eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis // In case the tokens were cached, have Preprocessor replace them with the 746eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis // annotation token. 747eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis PP.AnnotateCachedTokens(Tok); 748eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis return; 749eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis } 750eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis } 751eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis 752eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis if (SS.isNotEmpty()) { 753eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis // A C++ scope specifier that isn't followed by a typename. 75408b2c3743a29a2dddcf72e95f747760e213cdde7Argyrios Kyrtzidis // Push the current token back into the token stream (or revert it if it is 75508b2c3743a29a2dddcf72e95f747760e213cdde7Argyrios Kyrtzidis // cached) and use an annotation scope token for current token. 75608b2c3743a29a2dddcf72e95f747760e213cdde7Argyrios Kyrtzidis if (PP.isBacktrackEnabled()) 75708b2c3743a29a2dddcf72e95f747760e213cdde7Argyrios Kyrtzidis PP.RevertCachedTokens(1); 75808b2c3743a29a2dddcf72e95f747760e213cdde7Argyrios Kyrtzidis else 75908b2c3743a29a2dddcf72e95f747760e213cdde7Argyrios Kyrtzidis PP.EnterToken(Tok); 760eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis Tok.setKind(tok::annot_cxxscope); 761eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis Tok.setAnnotationValue(SS.getScopeRep()); 762eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis Tok.setAnnotationRange(SS.getRange()); 763eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis 764eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis // In case the tokens were cached, have Preprocessor replace them with the 765eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis // annotation token. 766eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis PP.AnnotateCachedTokens(Tok); 767eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis } 768eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis} 769eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis 770eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// TryAnnotateScopeToken - Like TryAnnotateTypeOrScopeToken but only 771eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// annotates C++ scope specifiers. 7724bdd91c09fd59e0c154d759288beff300e31e1d0Argyrios Kyrtzidisvoid Parser::TryAnnotateCXXScopeToken() { 7734bdd91c09fd59e0c154d759288beff300e31e1d0Argyrios Kyrtzidis assert(getLang().CPlusPlus && 7744bdd91c09fd59e0c154d759288beff300e31e1d0Argyrios Kyrtzidis "Call sites of this function should be guarded by checking for C++."); 7754bdd91c09fd59e0c154d759288beff300e31e1d0Argyrios Kyrtzidis 776eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis if (Tok.is(tok::annot_cxxscope)) 777eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis return; 778eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis 7794bdd91c09fd59e0c154d759288beff300e31e1d0Argyrios Kyrtzidis CXXScopeSpec SS; 7804bdd91c09fd59e0c154d759288beff300e31e1d0Argyrios Kyrtzidis if (MaybeParseCXXScopeSpecifier(SS)) { 781eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis 78208b2c3743a29a2dddcf72e95f747760e213cdde7Argyrios Kyrtzidis // Push the current token back into the token stream (or revert it if it is 78308b2c3743a29a2dddcf72e95f747760e213cdde7Argyrios Kyrtzidis // cached) and use an annotation scope token for current token. 78408b2c3743a29a2dddcf72e95f747760e213cdde7Argyrios Kyrtzidis if (PP.isBacktrackEnabled()) 78508b2c3743a29a2dddcf72e95f747760e213cdde7Argyrios Kyrtzidis PP.RevertCachedTokens(1); 78608b2c3743a29a2dddcf72e95f747760e213cdde7Argyrios Kyrtzidis else 78708b2c3743a29a2dddcf72e95f747760e213cdde7Argyrios Kyrtzidis PP.EnterToken(Tok); 788eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis Tok.setKind(tok::annot_cxxscope); 789eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis Tok.setAnnotationValue(SS.getScopeRep()); 790eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis Tok.setAnnotationRange(SS.getRange()); 791eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis 792eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis // In case the tokens were cached, have Preprocessor replace them with the 793eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis // annotation token. 794eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis PP.AnnotateCachedTokens(Tok); 795eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis } 796eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis} 797